Sukfacing-machine



A. E. CHAPPELL.

SURFACING MACHINE.

APPLICATION FILED NOV. 12, 1915. 1,195,780. PatentedAu'g. 22,1916.

2 SHEETS-SHEET I.

fisa i I 210672552 A. E. CHAPPE LL.

SUHFACING MACHINE.

APPLICATION FILED NOV-12,19I5- 1,195,780.- PatentedAug. 22,1916.

2 SHEETS-SHEET 2.

Witness fzvenior .ARTHUR E. CHAPPELL, OF CHICAGO, ILLINOIS.

SURFACING-MACHINE.

Specification of Letters Patent.

Patented Aug. 22, 1916.

Application filed November 12, 1915. Serial No. 61,007.

To all whom it may concern:

Be it known that I, ARTHUR E. CHAPPELL,

a citizen of the United States, residing at.

Chicago, in thecounty of Cook and State of Illinois, have invented certain new and useful Improvements in Surfacing- Machines, of which the following is a specification.

This invention relates to surfacing machines which are employed for the purposeof producing a smooth surface on floors, bowling alleys, etc., and aims to provide a power driven machine of this character which will be simple and compact in construction and at-the same time strong and durable, .and which will permit of the various adjustments of the surfacing tool which are required in order to obtain the most satisfactory results. In these machines it is essential that the surfacing tool be so mounted that it may be capable of adjustment on the machine frame toward and from the floor, and also capable of adjustment about anaxis parallel with the direction of movement of the machine. In other words, each end of the surfacing tool must be capable of vertical adjustment relatively to the other end in order to level the tool and position it in the required relation to the surface to be worked. i

One of the primary objects therefore ofthis invention is the provision of a novel and improved mounting for the surfacing tool which will' permittherequired adjustments of the tool relatively to the frame, which will-positively retain the tool in its adjusted positions, and which will prevent the vibrations of the tool from being transmitted directly to the machine frame and the motor. 5

Another object of my invention is to provide asingle member or support upon which the tool is mounted in lieu of two independent arms or supports such as have previously been employed and to so mount this member that it may be readily adjusted to position the tool carried thereby in any of the various required working positions.

A further object is to provide a yieldingly supported rigid structure by which both the motor and the surfacing tool are carried 'so that the operative relation between the tool and the motor is maintained at all times irrespective of variations in the position of the tool occasioned by adjustments thereof or irregularities in the surface being worked.

These and other objects and advantages of the invention will be better appreciated as the same is more fully understood from the following description when considered in connection with the accompanying drawlngs.

Referring to the drawingsFigure l is a plan view of a surfacing machine embodying my invention, the motor and other workmg parts being removed; Fig. 2 is a side I elevation partiallyin section of the machine shown in Fig. 1; and Fig. 3 is a sectional view on the line 33 of Fig. 2.

.From an inspection of the drawings it will be observed that the machine comprises a base or frame 5,.preferably of cast construction, which is substantially square in contour and is provided along'the front and rear walls with rearwardly extending flanges 6 and 7 respectively. At each corner there is an upstanding portion 8 provided with an inwardly extending flange 9, the purpose of which will later be described. The frame is supported intermediate its ends upon a shaft 11 extending transversely therethrough and carried at each end by a roller 12 adapted to roll along the floor or other surface being operated upon. An upwardly and rearwardly extending handle 13 attached to the rear end of the frame is equipped with a horizontally extending handle bar 14 adapted to be grasped by the operator and by means of which the machine is'moved about and tilted on its supporting shaft 11 to bring the tool into operative or inoperative position at will.

. A structure or member 15, preferably in the form of a rigid metal plate, is shaped to substantially fit within the frame 5 and is provided with a forwardly extending portion 16 to which the bearing plate 17, provided with the spaced bearings 18, is screwed or otherwise rigidly attached. The member 15 might, however, be of a form differing in shape from the flat plate shown.

A hollow bearing shaft 19 is rotatably attached andfby which it is carried. The

. shaft 21 which has a suction fit in the hol- 26. The motor is bolted or otherwise rigidly mounted upon the plate or supporting member 15 and it will therefore be manifest that since both the motor and the shaft 19 are carried by this rigid plate, the alinement and driving relation between the sprocket wheels 23 and 24 will always be maintained.

The supporting member 15 which loosely fits within the frame 5, as previously explained, is pivotally supported directly over the shaft 11 upon a pivot pin 27 which extends upwardly into an aperture 28 in the,

member, the pin being provided with a collar 29 which carries the weight of the member 15. This pivot pin may be supported from the shaft 11 in any approved manner but in the present instance I have shown as being threaded into the crown of a yoke member 31, the downwardly extending legs of which are mounted upon the shaft 11. Preferably the pivot pin is threaded into the crown of this yoke member so that it may be adjusted vertically, should occasion require, by turning the pin to thread it farther into or withdraw it from the yoke. The supporting member 15 is therefore supported upon the pivot pin 27 so as to be capable of'tilting movement in any direction about the pin.

Each rear corner of the supporting member 15 rests upon a coiled expansion spring 32 positioned upon the flange 7 in the rear corners of the frame. Each rear overhanging flange 9 is equipped'with a thumb screw 33 which engages the member 15 directly above the springs 32. The forward portion of the member 15 is likewise supported upon springs 34 resting upon the flange 6, and the forward overhanging flanges 9 are equipped with set screws 35 which instead of directly engaging the member 15, as do the screws '33, are provided with bosses or shoulders 36. Coiled expansion springs 37 are disposed between the shoulders 36 and the upper face of the member 15. It will thus be manifest that the supporting member 15 is yieldingly maintained in the required position in theframe andthat the springs by which it is held absorb the i i-- -brations of the rotating surfacing tool and prevent the same from being transmitted directly to the frame. The screws 33 and 35 may be manipulated to tilt the supporting member 15 on its pivot pin 27 into any desired position; that is, the front end carrying the surfacing tool shaft. may be raisedor lowered relatively to the frame and may also be tilted laterally so as to dispose the surfacing tool in the required relation to the floor or other surface being worked. When. the required adjustment has been effected the member is retained in its adjusted position by the screws and the expansion springs as previously explained.

In some types of the machine the pivot pin may be omitted entirely, the member being wholly supported on the springs.

The surfacing tool carried by the shaft 21, instead of being built up from a cylinder and independently constructed ends which prior to my invention have been attached to the cylinder in various ways, is constructed of ,a single castmember, designated generally by reference character 38, and comprises a cylindrical surface and the two end walls all cast en bloc. The cylinder is then sawed to provide a diagonally disposed slot 39 through which the ends of a strip of emery paper 41 or other abradingwmaterial are inserted, these ends being drawn tight and clamped inside the cylinder between a pair of clamping rollers 42 and 43 respectively. These rollers are-mounted directly beneath the slot 39, one end of the cylinder being bored. to provide bearings in which one end of each clamping roller is mounted,

the other ends of the rollers being sup-.

flattened as indicated at 45 and the end .of

this roller is squared as, indicated at 46 to receive a wrench or other tool by which the roller may be turned. When the roller 43 is turned so that its flat face 45 is opposed to the roller 42 a space is'left between the rollersinto which the ends of the strip of abrading material 41 may be inserted. The roller 43 is then turned into the position shown in Fig. 2, thereby clamping the endsof the abrading material between the rollers, drawing the material tightly around the cylinder and locking it in this position so that it will-not become loose or displaced during the operation of the tool.

In order to prevent 'the dust and material loosened by the tools from being thrown upwardly when the machine is in operation 1 have provided a guard or cover 46 adapted in a receptacle. In Fig. 1 the surfacing tool is shown in full lines in the position in which it is normally used, but since there are some placesin which it is desirable to use the .tool on the other side of the machine the shafts l9 and 21 are so constructed that which the surfacing tool may be readily ad-.

shaft 19 may be inserted into the hollow shaft 21 from the opposite end so as to dispose the tool in the position shown in dotted lines in Fig. 1. When in this position the tool may be run into corners and some locations which could not be reached with the tool in its normal position shown in full.

lines in Fig. 1.

It is believed that the construction and operation of my invention will be understood from the foregoing without further description, and it should .be obvious that I have provided a surfacing machine which is extremely simple in construction, in

justed into any required position, and in which all of the parts can be economically made and readily assembled. The invention, however, is not limited to the structural details shown and described but is capable of embodiment in structures differing widely in mechanical details from those employed herein for purposes of illustration merely.

I claim: 1. In a surfacing machine, the combination of a wheel-supported frame, a member. pivotally mounted in said frame, a surfacv ing tool'carried by said-member forwardly of the frame, and means for tilting said member laterally and longitudinally on its pivot to thereby adjust the position of said tool relatively to the surface to be worked.

2. In a surfacing machine, the combination of a wheel-supported frame, almember mounted in said frame so as to be capable of .tilting movement about a plurallty of hor1- zontal; axes, a surfacing toolcarried by said member, means for adjusting said member to vary the vertical position of said tool as a whole or either end thereof relatively to the other, and means for yieldingly holdingsaid member in adjusted position.

3. In a surfacing machine, the combination of a frame, a ,member pivotally supported therein upon a central vertically disposed pivot, a surfacing .tool carried by said member, means at each corner of said frame for adjusting said member about said pivot,

and springs interposed between said member and said frame.

4. In a surfacing machine, the combinationof a wheel-supported base, a rigid structure movably mounted on said base, a surfacing tool and a motor carried by said structure, and driving connections between said motorand said tool, said structure and the elements carried thereby being movable with respect to said base to vary the relative elevation of the ends of the tool.

5. In a surfacing machine, the combination of a substantially rectangular frame, a member pivotally mounted within said frame, springs interposed between the lower corners of said frame and the underside of said member, and adjusting screws mounted in each corner of the frame in position to operate upon the upper surface of said member whereby said member may be tilted both endwise and sidewise on its pivot.

6. In a su rfacing machine, the combinaon its pivot may be adjusted, springs inter-' posed between said plate and the frame be neath the plate, and a surfacing tool carried by the forward end of said plate.

7. In a surfacing machine, the combination of a base, a rigid structure, movably mounted on said base, a surfacing tool rotatably supported at one end only on said structure so as to extend laterally therefrom,

said structure being'movable. about an axisperpendicular to the axis of the tool to vary the. elevation .of the ends of the tool relatively to each other, a motor, and driving connectionsbetween said motor and said tool.

8. In a surfacing machine, the combination of awheel-supportedbase, a rigid structure mounted on said base so as to move about a plurality of horizontal axes, a surfacing tool rotatably supported by said structure so as to move therewith, a motor mounted on said structure, and driving connections between said motor, and said tool.

9. In a surfacing machine, the combination of a wheel-supported base, a rigid structure carried by but movable relatively to said base, a motor secured on said structure, a surfacing tool carried by said structure, means for tiltingsaid structure about an axis parallel with the direction of travel of the machine, and driving connections between said motor and said tool.

10. In a surfacing machine, the combination of a wheel-supported base, a rigid structure yieldingly carried by said base, so as to be capable of lateral tiltin movement to level a surfacing tool carrie thereby, a motor mounted on said structure above the base, a surfacing tool carried by said structure forwardly of the base, and driving connections between said motor and said tool.

11'. In a surfacing machine, the combination of a Wheel-supported base, a rigid structure movably mounted on said base, so as to vary the elevation of its longitudinal sides relatively to each other, a motor and a surfacing tool mounted on said structure and movable together With said structure relatively to the base, and driving connections between said motor and said tool. I

ARTHUR E. CHAPPELL. 

